was struck with the fact that this didn't -- there was no trauma. >> did you see any blood on leslie muellere was no blood. >> reporter: even leslie's clothing seemed unscathed. >> did you notice any markings, tears, scrapes on the jacket? on the coat? >> there was none. it was remarkably pristine. >> reporter: the pathologist who performed leslie's autopsy was also surprised by the lack of injuries to her body. >> did you observe any injuries to mrs. mueller that were consistent with breaking a fall? >> no, i did not. >> did you observe any consistent with falling on her head and shoulders off a cliff onto granite as described to you? >> no. >> reporter: and what's more, investigators found no forensic evidence that leslie ever hit that rock. .> there was no fibers on this rock. there was no blood on this rock. there was no hair on this rock. >> reporter: this is a very unique case in the sense that the evidence is lack of evidence. there's no evidence. >> that's the tough part of the case. what we have is a lot of evidence that what the defendant said is impossible. >> reporter: and here w